/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: HP
 * Date: 2023 -04 -11
 * Time: 16:50
 */
public class Main {
    public static void main(String[] args) {
        MyStringBuilder sb=new MyStringBuilder("asdafDAsaAHFHSAOfaf");
        System.out.println(sb.append(4));
        System.out.println(sb.append(new MyStringBuilder("342fseA")));
        System.out.println(sb.charAt(5));
        System.out.println(sb.subString(6,12));
        System.out.println(sb.toLowerCase());
    }
}
